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cpu_x86.c: avoid NULL-deref for invalid arguments

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* src/cpu/cpu_x86.c (x86Decode): Do not dereference NULL
when "models" is NULL and nmodels is 1 or greater.
This commit is contained in:
Jim Meyering 2010-01-26 19:58:48 +01:00
parent b74aadb3e5
commit 3970a2dc86
1 changed files with 4 additions and 1 deletions
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5
src/cpu/cpu_x86.c
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@ -1,7 +1,7 @@
/*
* cpu_x86.c: CPU driver for CPUs with x86 compatible CPUID instruction
*
* Copyright (C) 2009 Red Hat, Inc.
* Copyright (C) 2009-2010 Red Hat, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
@ -954,6 +954,9 @@ x86Decode(virCPUDefPtr cpu,
if (data == NULL || (map = x86LoadMap()) == NULL)
return -1;
if (models == NULL && nmodels != 0)
return -1;
candidate = map->models;
while (candidate != NULL) {
bool allowed = (models == NULL);